The London2Cambridge Challenge also incorporates the 26.2 mile Capital Marathon Challenge. Both challenges start near the iconic Olympic Park and head up the Lea Valley - past locks, parkland and wetlands. The Marathon finishes in Hertford - the Ultra continues on through picturesque countryside up to Cambridge.

he historic Thames Path provides beautiful and varied scenery as a backdrop for Action Challenge’s weekend of endurance events! You can choose to take on the full 100km Ultra marathon, a 50km half, or 25km.

The routes are marshalled the whole way along with plenty of toilets and rest stops, there are free meals, drinks and snacks. Plus medals AND bubbly at the end!